276303421 has 2 divisors, whose sum is σ = 276303422. Its totient is φ = 276303420.

The previous prime is 276303413. The next prime is 276303427. The reversal of 276303421 is 124303672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 260984025 + 15319396 = 16155^2 + 3914^2 .

It is a cyclic number.

It is not a de Polignac number, because 276303421 - 2³ = 276303413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 276303421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276303427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138151710 + 138151711.

It is an arithmetic number, because the mean of its divisors is an integer number (138151711).

Almost surely, 2^276303421 is an apocalyptic number.

It is an amenable number.

276303421 is a deficient number, since it is larger than the sum of its proper divisors (1).

276303421 is an equidigital number, since it uses as much as digits as its factorization.

276303421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 276303421 is about 16622.3771164055. The cubic root of 276303421 is about 651.3215094572.

The spelling of 276303421 in words is "two hundred seventy-six million, three hundred three thousand, four hundred twenty-one".